Screws are tools that use the physics and mathematics of an object's beveled circular rotation and friction to gradually fasten mechanical parts. In the use of teeth often occur between the teeth can not be close, too hard to lock the screw head off, or bad teeth lock is not tight and so can not meet the conditions of use, are all quality accuracy problems. So come today and tell us how the screw is doing strength torsion test.
Screw strength torque test:
1. Turning force test: The torsional force of a product is to demonstrate its ability to resist being reversed in half. Various standards have the minimum requirements for the torsional force of self-tapping screws. In this test, the screws are clamped on a torsion tester with a tapped part in the middle of tapping, and then the torque wrench is used until the screws are broken. If the torque does not exceed the minimum required, the test product fails. Failed to show that the screw is too soft or the diameter of the thread is too small.
2. Locking test: This test locks the screw to a test plate with the specified hardness/thickness and hole diameter. If the screw locks over the test plate but the threads are deformed, the product fails. Failed to show that the surface hardening of the screw is too light or too soft.
3, lock torque test: This test only screw screw screw is needed. When the lock test was performed, the minimum locking torque of the test board was observed. If the torque exceeds the specified standard value (the standard value is based on the size of the screw/surface treatment), the product fails. Failed to show that the surface of the screw is not sufficiently lubricated, or that the thread is not properly formed and requires more torque.